Venus — a hot planet pocked with tens of thousands of volcanoes — may be even more geologically active near its surface than previously thought. New calculations by researchers at Washington ...

The interiors of rocky planets and moons tend to be pretty hot compared with their surfaces. This heat, which can be caused by a number of sources — such as tidal stretching and compression, the ...

On a time scale of tens to hundreds of millions of years, the geomagnetic field may be influenced by currents in the mantle. The frequent polarity reversals of Earth's magnetic field can also be ...

Earth is the only known planet to host life, a fact that has long intrigued scientists. While Venus and Mars present extreme ...

The speed of seismic waves can reveal the temperature of structures under Earth’s surface, with faster waves indicating cooler temperatures and slower waves, warmer ones. Unusually low wave speeds ...